﻿// http://www.zimms.com
// Copyright (c) 2002-2007
// by James Zimmerman
//
// Permission is hereby granted, free of charge, to any person obtaining a copy of
// this software and associated documentation files (the "Software"), to deal in the
// Software without restriction, including without limitation the rights to use,
// copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the
// Software, and to permit persons to whom the Software is furnished to do so, subject
// to the following conditions:
//
// The above copyright notice and this permission notice shall be included in all copies
// or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
// INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
// PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
// HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
// SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

using System;
using Microsoft.Practices.ObjectBuilder;

/// <summary>
/// Concrete implementation of <see cref="IServiceProvider"/> that provided access to the factory capabilities of Object Builder subsystem.
/// </summary>
/// <remarks>
/// <note type="implementnotes">
/// This type provides a simplistic implementation of a bridge to Object
/// Builder. Type mapping, contructor literals, and lifetime management
/// facilities are not utilized in this version.
/// </note>
/// </remarks>
public class ObjectBuilderServiceLocator : IServiceProvider
{
    private readonly Builder builder = new Builder();
    private readonly Locator locator = new Locator();

    /// <summary>
    /// Gets the service object of the specified type.
    /// </summary>
    /// <param name="serviceType">An object that specifies the type of service object to get.</param>
    /// <returns>A service object of type <paramref name="serviceType"/>. -or- <see langkeyword="null">null</see>
    ///if there is no service object of type <paramref name="serviceType"/>.</returns>
    /// <exception cref="ArgumentNullException"><paramref name="serviceType"/> is <see langkeyword="null">null</see>.</exception>
    public virtual Object GetService(Type serviceType)
    {
        if (serviceType == null) throw new ArgumentNullException("serviceType");
        return this.builder.BuildUp(this.locator, serviceType, null, null);
    }
}

